The variations in length of the pterygoid process as a function of the variations of the sphenoid angle.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000818:Animals; D002417:Cattle; D004285:Dogs; D005260:Female; D006736:Horses; D006801:Humans; D008297:Male; D008875:Middle Aged; D012756:Sheep; D012886:Skull / Q000033:anatomy & histology; D013100:Sphenoid Bone / Q000033:anatomy & histology* / Q000502:physiology; D013552:Swine